/*
 * BASED ON ANDROID TIMEPICKERDIALOG!
 * 
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package sw6.visualschedule.extendedViews;

import sw6.visualschedule.R;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.DatePicker;
import android.widget.DatePicker.OnDateChangedListener;
import android.widget.TimePicker;
import android.widget.TimePicker.OnTimeChangedListener;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

/**
 * A simple dialog containing an {@link android.widget.DatePicker}.
 *
 * <p>See the <a href="{@docRoot}resources/tutorials/views/hello-datepicker.html">Date Picker
 * tutorial</a>.</p>
 */
public class DateTimePickerDialog extends AlertDialog implements OnClickListener, OnDateChangedListener, OnTimeChangedListener {

    private static final String YEAR = "year";
    private static final String MONTH = "month";
    private static final String DAY = "day";
    
    private final DatePicker mDatePicker;
    private final TimePicker mTimePicker;
    private final OnDateTimeSetListener mDateTimeCallBack;
    private final Calendar mCalendar;
    private final java.text.DateFormat mTitleDateFormat;
    //private final String[] mWeekDays;

    private int mInitialYear;
    private int mInitialMonth;
    private int mInitialDay;
    private int mInitialHour;
    private int mInitialMinute;

    /**
     * The callback used to indicate the user is done filling in the date.
     */
    public interface OnDateTimeSetListener {

        /**
         * @param view The view associated with this listener.
         * @param year The year that was set.
         * @param monthOfYear The month that was set (0-11) for compatibility
         *  with {@link java.util.Calendar}.
         * @param dayOfMonth The day of the month that was set.
         */
        void onDateTimeSet(DatePicker datePickerView, TimePicker timePickerView, int year, int monthOfYear, int dayOfMonth, int hourOfDay, int minute);
    }

    /**
     * @param context The context the dialog is to run in.
     * @param theme the theme to apply to this dialog
     * @param callBack How the parent is notified that the date is set.
     * @param year The initial year of the dialog.
     * @param monthOfYear The initial month of the dialog.
     * @param dayOfMonth The initial day of the dialog.
     */
    public DateTimePickerDialog(Context context, OnDateTimeSetListener callBack, Date date, boolean is24HourView) {
        super(context);

        mDateTimeCallBack = callBack;
        
        final GregorianCalendar cal = new GregorianCalendar();
        cal.setTime(date);
        
        mInitialYear = cal.get(Calendar.YEAR); 
        mInitialMonth = cal.get(Calendar.MONTH);
        mInitialDay = cal.get(Calendar.DAY_OF_MONTH);
        mInitialHour = cal.get(Calendar.HOUR_OF_DAY);
        mInitialMinute = cal.get(Calendar.MINUTE);
        
        //DateFormatSymbols symbols = new DateFormatSymbols();
        //mWeekDays = symbols.getShortWeekdays();
        
        mTitleDateFormat = java.text.DateFormat.getDateTimeInstance(java.text.DateFormat.MEDIUM, java.text.DateFormat.SHORT);
                                
        mCalendar = Calendar.getInstance();
        updateTitle(mInitialYear, mInitialMonth, mInitialDay, mInitialHour, mInitialMinute);
        
        setButton(context.getString(android.R.string.ok), this);
        setButton2(context.getString(android.R.string.cancel), (OnClickListener) null);
        
        //setButton(context.getText(R.string.date_time_set), this);
        //setButton2(context.getText(R.string.cancel), (OnClickListener) null);
        //setIcon(R.drawable.ic_dialog_time);
        
        final LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        final View view = inflater.inflate(R.layout.date_time_picker, null);
        setView(view);
        
        mDatePicker = (DatePicker) view.findViewById(R.id.DatePicker);
        mDatePicker.init(mInitialYear, mInitialMonth, mInitialDay, this);
        
        mTimePicker = (TimePicker) view.findViewById(R.id.TimePicker);
        mTimePicker.setIs24HourView(is24HourView);
        mTimePicker.setCurrentHour(mInitialHour);
        mTimePicker.setCurrentMinute(mInitialMinute);
        mTimePicker.setOnTimeChangedListener(this);
    }

    /*
    @Override
    public void show() {
        super.show();
    }
     */
    
    public void onClick(DialogInterface dialog, int which) {
        if (mDateTimeCallBack != null) {
            mDatePicker.clearFocus();
            mDateTimeCallBack.onDateTimeSet(
            		mDatePicker, 
            		mTimePicker,
            		mDatePicker.getYear(), 
                    mDatePicker.getMonth(), 
                    mDatePicker.getDayOfMonth(), 
                    mTimePicker.getCurrentHour(), 
                    mTimePicker.getCurrentMinute());
        }
    }
        
    private void updateTitle(int year, int month, int day, int hourOfDay, int minute) {
        mCalendar.set(Calendar.YEAR, year);
        mCalendar.set(Calendar.MONTH, month);
        mCalendar.set(Calendar.DAY_OF_MONTH, day);
        mCalendar.set(Calendar.HOUR_OF_DAY, hourOfDay);
        mCalendar.set(Calendar.MINUTE, minute);
        
        setTitle(mTitleDateFormat.format(mCalendar.getTime()));
    }
    
    @Override
    public Bundle onSaveInstanceState() {
        final Bundle state = super.onSaveInstanceState();
        state.putInt(YEAR, mDatePicker.getYear());
        state.putInt(MONTH, mDatePicker.getMonth());
        state.putInt(DAY, mDatePicker.getDayOfMonth());
        return state;
    }
    
    @Override
    public void onRestoreInstanceState(final Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        final int year = savedInstanceState.getInt(YEAR);
        final int month = savedInstanceState.getInt(MONTH);
        final int day = savedInstanceState.getInt(DAY);
        mDatePicker.init(year, month, day, this);
        updateTitle(year, month, day, mInitialHour, mInitialMinute);
        
    }

    @Override
    public void onDateChanged(DatePicker view, int year, int month, int day) {
    	mInitialYear = year;
        mInitialMonth = month;
        mInitialDay = day;
    	updateTitle(year, month, day, mInitialHour, mInitialMinute);        
    }
    
	@Override
	public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {				
		mInitialHour = hourOfDay;
		mInitialMinute = minute;
		updateTitle(mInitialYear, mInitialMonth, mInitialDay, hourOfDay, minute);
	}
}